Question

我只是一个创建的Recycler View包含CardsView我已经创建了一个项目和模型和适配器，我还设置了适配器这个Recycelr View显示为警告对话框我已经填充了这个循环视图但它显示为空这样这是MainActivity.Java

package yourneeds.find.com.modifieritemsalertdialog;

import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    Button click;
    private List<ItemModifierModel> Modifiers;
    RecyclerView modifierItemList;
    Context context;
    public static ItemModifierAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        click = (Button) findViewById(R.id.button);


        initializeData();
        click.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Button cancelBtn, okBtn;
                LayoutInflater inflater2 = MainActivity.this.getLayoutInflater();
                View view2 = inflater2.inflate(R.layout.remove_item_alert_dialog, null);
                 modifierItemList = (RecyclerView) view2.findViewById(R.id.ipcET);
                modifierItemList.setHasFixedSize(true);
                modifierItemList.setLayoutManager(new LinearLayoutManager(MainActivity.this));
                LinearLayoutManager llm = new LinearLayoutManager(MainActivity.this);
                modifierItemList.setLayoutManager(llm);
                okBtn = (Button) view2.findViewById(R.id.okBtn);
                cancelBtn = (Button) view2.findViewById(R.id.cancelBtn);
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);

                modifierItemList.setAdapter(adapter);

                builder.setView(view2);
                builder.setCancelable(false);
                final AlertDialog alert11 = builder.create();





                okBtn.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        alert11.dismiss();
                    }
                });

                cancelBtn.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        alert11.dismiss();
                    }
                });
                alert11.show();
            }
        });
    }
    List<ItemModifierModel> ItemModifierModels;
    private void initializeData(){
        Modifiers = new ArrayList<>();
        Modifiers.add(new ItemModifierModel("204", "Regular"));
        Modifiers.add(new ItemModifierModel("205", "Regular"));
        Modifiers.add(new ItemModifierModel("206", "Regular"));
        Modifiers.add(new ItemModifierModel("207", "Regular"));
        Modifiers.add(new ItemModifierModel("208", "Regular"));
        Modifiers.add(new ItemModifierModel("209", "Regular"));
        Modifiers.add(new ItemModifierModel("210", "Regular"));
        Modifiers.add(new ItemModifierModel("211", "Regular"));
        Modifiers.add(new ItemModifierModel("212", "Regular"));
    }

    private void initializeAdapter(){
        ItemModifierAdapter adapter = new ItemModifierAdapter(Modifiers);

    }
}

Answer 1

将适配器放在onClick（）方法中，然后将其添加到recyclerview

modifierItemList.setLayoutManager(llm);
ItemModifierAdapter adapter = new ItemModifierAdapter(Modifiers);
modifierItemList.setAdapter(adapter);
okBtn = (Button) view2.findViewById(R.id.okBtn);

Answer 2

这应该可以使它工作。

package yourneeds.find.com.modifieritemsalertdialog;

import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    Button click;
    private List<ItemModifierModel> Modifiers;
    RecyclerView modifierItemList;
    Context context;
    public static ItemModifierAdapter adapter;
    List<ItemModifierModel> ItemModifierModels;
    LinearLayoutManager llm;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        click = (Button) findViewById(R.id.button);
        modifierItemList = (RecyclerView) view2.findViewById(R.id.ipcET);
        modifierItemList.setHasFixedSize(true);
        llm = new LinearLayoutManager(MainActivity.this);
        modifierItemList.setLayoutManager(llm);

        Modifiers = new ArrayList<>();

        // Initialize Data
        Modifiers.add(new ItemModifierModel("204", "Regular"));
        Modifiers.add(new ItemModifierModel("205", "Regular"));
        Modifiers.add(new ItemModifierModel("206", "Regular"));
        Modifiers.add(new ItemModifierModel("207", "Regular"));
        Modifiers.add(new ItemModifierModel("208", "Regular"));
        Modifiers.add(new ItemModifierModel("209", "Regular"));
        Modifiers.add(new ItemModifierModel("210", "Regular"));
        Modifiers.add(new ItemModifierModel("211", "Regular"));
        Modifiers.add(new ItemModifierModel("212", "Regular"));

        // Initialize Adapter
        adapter = new ItemModifierAdapter(Modifiers);

        // Set Adapter
        modifierItemList.setAdapter(adapter);

        click.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Button cancelBtn, okBtn;
                LayoutInflater inflater2 = MainActivity.this.getLayoutInflater();
                View view2 = inflater2.inflate(R.layout.remove_item_alert_dialog, null);
                okBtn = (Button) view2.findViewById(R.id.okBtn);
                cancelBtn = (Button) view2.findViewById(R.id.cancelBtn);              
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                builder.setView(view2);
                builder.setCancelable(false);
                final AlertDialog alert11 = builder.create();
                okBtn.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        alert11.dismiss();
                    }
                });
                cancelBtn.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        alert11.dismiss();
                    }
                });            
                alert11.show();
            }
        });
    }
}

显示时，RecyclerView为空

2 个答案: